<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 2. 输入3个数字，alert输出3个数字中的最大值
        let arr = []
        for (let i = 1; i <= 3; i++) {
            let num = +prompt(`请输入第${i}个数字`)
            arr.push(num)
        }
        console.log(arr)
        let max = arr[0]
        for (let i of arr.keys()) {
            if (arr[i] > max) {
                max = arr[i]
            }
        }
        alert(`最大值时${max}`)




    </script>

</body>

</html>